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openssl/doc/man3/RSA_blinding_on.pod
Shane Lontis e52b421575 Update deprecated API's in the documentation.
The reported issue related to EC_KEY deprecations
Fixes 

Searches were done in the pod files for all libcrypto.num
entries containing DEPRECATEDIN_3_0 to find additional missing entries.

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14564)
2021-03-30 09:45:07 +10:00

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=pod
=head1 NAME
RSA_blinding_on, RSA_blinding_off - protect the RSA operation from timing attacks
=head1 SYNOPSIS
#include <openssl/rsa.h>
Deprecated since OpenSSL 3.0, can be hidden entirely by defining
B<OPENSSL_API_COMPAT> with a suitable version value, see
L<openssl_user_macros(7)>:
int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
void RSA_blinding_off(RSA *rsa);
=head1 DESCRIPTION
All of the functions described on this page are deprecated.
RSA is vulnerable to timing attacks. In a setup where attackers can
measure the time of RSA decryption or signature operations, blinding
must be used to protect the RSA operation from that attack.
RSA_blinding_on() turns blinding on for key B<rsa> and generates a
random blinding factor. B<ctx> is B<NULL> or a preallocated and
initialized B<BN_CTX>.
RSA_blinding_off() turns blinding off and frees the memory used for
the blinding factor.
=head1 RETURN VALUES
RSA_blinding_on() returns 1 on success, and 0 if an error occurred.
RSA_blinding_off() returns no value.
=head1 HISTORY
All of these functions were deprecated in OpenSSL 3.0.
=head1 COPYRIGHT
Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
=cut